Traditionally
Electrolytic capacitors have been used most of the DC Link applications. The
main reason has been the low cost per capacitance for these capacitors.
However, they have a limitation on the maximum voltage applied (600Vdc) which
necessitates series and parallel combination, high ESR and low life expectancy.
Further, they are one of the components most prone to failure. The main failure
mechanisms include the loss of electrolyte through out-gassing and chemical
changes to the oxide layer. All the degradation mechanisms are aggravated by
ripple current heating.
Over
the years Electronicon Kondesatoren GmbH, has developed and proven Film
Capacitors as a an alternative of choice for DC- Link applications.
Electronicon capacitors with film metallisation as core capability and the use
of SecumetTM metallisation technology leaves the conventional
metallisation and segmented film solutions far behind.
The film DC links are now available also for smaller systems of less than 5kw, in PCB mounted construction.
Following are the advantages as a designer that you get while moving from Electrolytic to Film DC links, besides the cost advantage.
What is in it for You?
1. Extremely long life greater than 150000hrs - High reliability of your equipment
2. Extremely low losses compared to electrolytic caps.- Lower running costs, savings for the end user
3. Extremely low self inductance- lower parasitic
4. Accurate capacitance values- eliminating the need for sharing resistors- Savings due removal of additional item and operations
5. No losses due to sharing resistors- lower cooling costs Lower Running costs
6. Reduced capacitance need- due to 5 times more current handling than electrolytic capacitors.- reduced risk by lowered energy density inside the equipment-
7. Voltage rating upto 5000Vdc available in single container.- no more headaches of series and parallel connections
8. No forming ( pre- loading) of capacitors required- as needed for electrolytic capacitors.- reduced risk of failure due to negligence at final customer, increases robustness of your product
9. Unlimited shelf life- no risk of scrapping
10. PCB mounted, Bolt fixing or Clamp fixing both are possible.- covers all your needs and applications
11. Strong Connections for direct mounting on the busbars- ease of use and longevity of connections
12. Dry construction- No risk of spillage, no aggressive electrolytes, helps you comply with stringent environmental regulations
13. UL Approved capacitors –safety guaranteed
1. Extremely long life greater than 150000hrs - High reliability of your equipment
2. Extremely low losses compared to electrolytic caps.- Lower running costs, savings for the end user
3. Extremely low self inductance- lower parasitic
4. Accurate capacitance values- eliminating the need for sharing resistors- Savings due removal of additional item and operations
5. No losses due to sharing resistors- lower cooling costs Lower Running costs
6. Reduced capacitance need- due to 5 times more current handling than electrolytic capacitors.- reduced risk by lowered energy density inside the equipment-
7. Voltage rating upto 5000Vdc available in single container.- no more headaches of series and parallel connections
8. No forming ( pre- loading) of capacitors required- as needed for electrolytic capacitors.- reduced risk of failure due to negligence at final customer, increases robustness of your product
9. Unlimited shelf life- no risk of scrapping
10. PCB mounted, Bolt fixing or Clamp fixing both are possible.- covers all your needs and applications
11. Strong Connections for direct mounting on the busbars- ease of use and longevity of connections
12. Dry construction- No risk of spillage, no aggressive electrolytes, helps you comply with stringent environmental regulations
13. UL Approved capacitors –safety guaranteed
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